/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/NiagaraSystemViewModel.h
Utility method to gather all graphs marked as selected via the system selection viewmodel.
[TArray](API\Runtime\Core\Containers\TArray)< [UNiagaraGraph](API\Plugins\NiagaraEditor\UNiagaraGraph) * > GetSelectedGraphs()